The Islands of Khanta [Custom Terrain]

The Islands of Khanta features several large islands situated somewhere far out in the ocean. On each island you will find a different biome and this makes it a quite interesting and enjoyable map to explore. For example, the main island in the center includes a normal plains biome with some rocky mountains and another island features a huge mountain of lava.

Is there anything hidden on the starting island? I’ve found the end island, the igloo basement , the bottom of the well , the mineshaft , the nether island , the jungle temple… but nothing on the main island and start island